Racing hull



April 1955 M. R. LEONE 2,741,207

RACING HULL Filed Nov. 6, 1952 40 F/g./ 58 I4 Maw/n H. Leone INVENTOR.

United States Patent RAC ULL Martin R. Leone, Perth Amboy, N. J. Ap a i n No mb r 1 Se ial Ne- 31 3 8 Claims. (Cl. 114-665) flh s inv tion rel t s in g ral to pow oa s, nd m r pe ifi ly t a in hull adap edto ha e a 2.1.3. ins o hy r dyn mi f ng ea t on whe for ardly propelledlthrough the water. The primary object of invention is to provide an improved racing hull. of the planing type which includes a bottom having a. new and novel arrangement of hydrodynamic liftingsurfaces where:

by a m n mum of resistance t he f rard mo em nt of the hull through the water is effected, and at the time, the hull is relatively stable.

Another object of this invention is to provide an improved racing hull whose bottom is in the form of. as

2 161 includes abottom, which is'referred toin general-by the reference numeral 1-2, sides 14 extending'upwardly from the sides and bow edges of the bottom- 12, and a stem 16 extending upwardly at the aft endof the bottom 12. and being secured: at its outer edges; to the aft portionsof the sides: 14-. The hull 10 also includes a deck- 18enclosingthe forward portionof thehull, the declt 1 8- extendingbetweenand being secured to the top edges of the; sides 14.

It will be.- understood that the general configurations? ing Qtnitted. for purposesof clarity.

p ral y f Pl na fa which m y b qu y and si y sem led o on n na o b ld g m teri ls so as to be economically feasible.

A further object of this invention is to provide an improved racing hull. which includes a bottom having first and second central surfaces on which the boat is intended to normally ride, and outer auxiliary surfaces which are adapted to engage the surface of water through which the hull is moving to urge the same to an even keel upon movement of the hull from the same.

A still further object of this invention is to provide an improved hull of the planing type whichv is adapted to ride on a rear portion of a centrai bottom surface and which has all of the advantages of a conventional hydroplane without utilizing a stepped bottom construction.

These together withother objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a bottom plan view of the racing hull which is the subject of this invention and shows the general configuration of the various surfaces of the bottom thereof;

Figure 2 is a side elevational view of the hull of Figure l and shows the general appearance of the same;

Figure 3 is a front elevational view of the racing hull of Figure '1';

Figure 4 is a stern view of the racing hull and showsthe general appearance of the same;

Figure 5 is a transverse vertical sectional view taken substantially upon the plane indicated by the section line o g re 2 an h s h ene a a ra m nt of the bottom surfaces adjacent the bow of the hull;

Figure 6 is a transverse vertical sectional view taken substantially upon the plane indicated by the fifiction line 6--6 of Figure 2 and shows the general relationship .of the bottomisurfaces at the intersection of a forward set of bottom surfaces with an aft set of bottom surfaces; and

Figure 7 is a transverse vertical sectional view taken substantially upon the plane indicated by the section line 7-7 of Figure 2 and shows the general arrangement of the bottom surfaces adjacent the stern of the racing hull.

"Referr'ingnow to the drawings in detail, it is seen that there is illustrated a racing hull which is referred to in general by the reference numeral 10. The racing hull The. bottomv 12: includes a substantially horizontalr rezoidai central bottom surface 20 which is planar; the bottom; Surface: extending forwardly from the stern 16 to a: medial point of the-hull. The. central bottom surface 2% has parallel: forwardsand stern edges 22: and 24, respegtiyely with, the stern edge 24 being of: a greater width than, the: forward edge 22. The central bottom s ir ee: 2 also. includes side; edges 26 and 28 which din as rea andln The bottom: 312, also includes a triangular central bot-- torn sgrface; 35 which is also planar and which intersects the centralrhottom surface 29, the triangular central bot torn, snrt'ace 3t), eggteuding forwardly from. the, forward edge 22 hecentral bottom surface 20; to. the: bow-of h hl l I; in noted that t e triang h m s rf ce 3 i bo nde b anaf e edge 32, whi h is co.- ez tensive with. the edge 22 of the bottom surface 20, and orw r ynn e s s dccs ses 3st n 3. whichinterset at the bow of the hill 16. As is best illustrated in Figure- 2 t e r a u a b tnm sari-ac 0 a o ex ends up: wardly and. forwardly relative to the bottom surface 20.

The bottom 12 also includes trapezoidal outer; auxiliary o t m s rf c s 3. n 0 h c a di ersed on onposite sides of the central bottom surface ztl'a d whichin tersect the sameat the side edges 28 and 26, respectively. The outer bottom surface 38,. includes an inner side edge 42 which is co-extensive with the side edge 28 the o toms-min e 2- and th te mm ur 40 ine de a nne edg 4 w ic s o xtens wi h the de ed 2. of t e w t m surface nutc a x l a b m s c 38 a s c udes spaced parallel forward and aft edges 46 and 48, respec cly- Th ai d .8 i alo a in f n ersection at the au riliary outer, bottom surface. 38. with a bottom edge 9rt qn-. the ster .1 Th?- f W d e 46 is n li nent wi h ths'ed .22 v ndifl. o t e t om were 2.0- and 3% espec e an l e in. a mmqn tr n e tigal plane therewith. Ihe outer auxiliary bottom sur-. ce fifia s ins ud s an o te ide e e 5 al h c a bot om PQIFiOI! o ne Q the s e 4 te s 1 outer augriliary bottom. surface 38 t w l be note that the outer xiliary bottom sur ac ha sonfisn a i n id n ca o h 'c n t icn of the outer auxiliary bottom surface 38 and the same in l e spaced p rall fo war an a d es 52. and .5 s c c The o t r auxil a tom f c 0 intersects he st n 1 along th a t e 5 and t e for W edge 2 s n ali nm n w t h af emen ione edges 2 n 6 n be n di osed in a comin s transverse vertical plane therewith. The outer aurriliary bottom surface 40' also includes an outer side edge 56 which is disposed at its line 'of intersection with a bottom portion of one of the sides 14. Referring now to Figure 7 in particular, it will be seen that the bottom surfaces 38 and 40 are disposed at an angle to the central bottom surface 20 and extend upwardly and outwardly therefrom. Also, as is best illustrated in Figure l, the outer auxiliary bottom surfaces 38 and 40 have their side edges converging rearwardly whereas the side edges of the centralbottornsurface 20 diverge rearwardly. The surfaces 20, 38 and 40 form a first set of surfaces.

, Referring once again to Figure 1 in particular, it is seen that the bottom 12'also includes forward generally triangularly-shaped outer auxiliary bottom surfaces 58 and 60, which are disposed on opposite sides of the triangular central bottom surface 30. The outer auxiliary bottom surfaces 53 and 60 are identical and intersect the outer auxiliary bottom surfaces 49 and 38, respectively, at the forward edges of the same. The surfaces 30, 58 and 60 form a second set of surfaces.

The outer auxiliary bottom surface 58 includes an inner side edge 62 which is co-extcnsive with the side edge 34 of the triangular central bottom surface 30. The outer auxiliary bottom surface 58 also includes an after edge 64 which is co-extensive with the forward edge 52 of the outer auxiliary bottom surface 69. The bottom surface 50 is also bounded by an outer side edge 66 which is disposed along the line of intersection of the bottom surface 58 with the forward portion of one of the sides 14.

The outer auxiliary bottom surface 60 includes an in net side edge 68 which is co-extensive with the side edge 36 of the triangular central bottom surface. The outer auxiliary bottom surface 60 also includes an after edge 70 which is co-extensive with the forward edge 46 of the 4 returned to its normal planing position in the event that the bow portion of the bottom become in engagement with the surface of the water during erratic flotation action of the hull.

A hull of the aforementioned design has been constructed and tested with extremely satisfactory results and has proved highly eflicient inasmuch as a minimum drag is effected due to the novel contour of the bottom 12. The

hull actually constructed and tested had the following dimensions:

The length of the hull was 108 inches and the width at the stern was 50 inches. The beam at the intersection of the bottom surfaces 20 and was 44 inches.

The trapezoidal central bottom surface 20 had a length of 50 inches and the length of its forward edge 22 was 12 inches. The length of its after edge 24 was 36 inches.

The outer auxiliary bottom surfaces 38 and 40, which are identical, had forward edges, the edges 46 and 52, Whose horizontally projected limbs were 16 inches. The horizontally projected lengths of the after edges, edges 48 and 54, of the outer auxiliary bottom surfaces 38 were 7 inches.

The upwardly and outwardlyslope of the outer auxiliary bottom surfaces 38 and 40 with respect to the central bottom surface 20 was such to produce a vertical offsetting of 1% inches at the stern to produce a bevel of 1 in 4.

V Inasmuch as the triangular outer auxiliary bottom surbottom surface 38. The bottom surface 60 .is further bounded by an outer side edge 72 which is disposed along the line of intersection of the outer auxiliary bottom surface 60 with a forward portion of one of the sides 14.

Referring now to Figures 5 and 6 in particular, it is seen that the outer auxiliary bottom surfaces 58 and 60 are disposed at angles to the triangular central bottom surface 30 and extend upwardly and outwardly therefrom. It will be understood that the outer auxiliary bottom surfaces 58 and 60 also extend upwardly and forwardly at an angle to their respective outer auxiliary bottom surfaces 48 and 38, respectively.

' While it is preferred that the various bottom surfaces described above be formed of separate panels, such as plywood, etc., it will be understood that if it is desired, the entire bottom 12 may be formed in one or more integral sections.

It is the intention of this invention that the racing hull 10 when normally resting in a body of water will have portions of all of the bottom surfaces in wetting engagement with the Water. However, when the racing hull 10 is propelled through the water at a relatively high speed by a suitable power unit (not shown), the intention of this invention is that the triangular bottom surfaces 30, 58 and 60 be lifted out of direct wetting engagement with the surface of the body of water and that only the after portions of the trapezoidal bottom surfaces 20, 38 and 40 be in wetting engagement with the water. It will be understood that during movement of the racing hull 10 through the water, the draft of the same will be reduced to a minimum during the planing action of the same, and that only a very small part of the lower portions of the outer auxiliary bottom surfaces 38 and 49 will be in actual wetting engagement with the water.

It is the intention of this invention that should the hull 10 at'any time have a tendency to keel over to either one side or the other, that the outer auxiliary bottom surface at that side have an increased contact with the surface of the body of water with said increased contact resulting in a thrust urging the horizontal trapezoidal central bottom surface 20 back to its normal horizontal position. It is also the intention of this invention that the triangular bottom surfaces 30, 58 and 60 engage the surface of a body of water in such a'manner that the hull 10 will be be resorted to, falling within the scope of the appended to each other, said surfaces being arranged in sets in.

faces 58 and 69 intersect the trapezoidal outer auxiliary bottom surfaces 49 andr 38, respectively, along common lines, it will be seen that the upwardly and outwardly slope of these bottom surfaces with respect to their associated,

tion is believed to be unnecessary. However, since nu-- merous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly, all suitable modifications and equivalents may claims.

What is claimed as new is as foliows:

1. A boat hull of the planing type including a bottonr formed of a plurality of planar surfaces disposed at angles longitudinal alignment, central surfaces of each set being disposed normal to a vertical plane passing through a con-1 tral longitudinal axis of said hull, outer surfaces of each set being disposed at an angle to their respective central formed of a plurality of planar surfaces disposed at angles to each other, said surfaces being arranged in sets in longitudinal alignment, the surfaces of one set being generally triangular in outline, the surfaces of a second set being generallly trapezoidal in outline.

3. A boat hull of the planing type including a bottom formed of a plurality of planar surfaces disposed at angles to each other, said surfaces being arranged in sets in longi tudinal alignment, central surfaces of each set being dis-,

posed normal to a vertical plane passing through a central longitudinal axis of said hull, outer surfaces of each set being disposed at an angle to their respective central in outline, the surfaces of a second set being generally trapezoidal in outline.

4. A boat hull of the planing type including a substantially horizontal trapezoidal central bottom surface extending forwardly from a stern end of the hull to a medial point of the hull, a generally triangular central bottom surface extending rearwardly from a bow of the hull and intersecting said trapezoidal bottom surface, first outer auxiliary bottom surfaces extending outwardly from said trapezoidal bottom surface, second outer auxiliary surfaces extending outwardly from said triangular bottom surface.

5. A boat hull of the planing type including a substantially horizontal trapezoidal central bottom surface extending forwardly from a stern end of the hull to a medial point of the hull, a generally triangular central bottom surface extending rearwardly from a bow of the hull and intersecting said trapezoidal bottom surface, first outer auxiliary bottom surfaces extending outwardly from said trapezoidal bottom surface, second outer auxiliary surfaces extending outwardly from said triangular bottom surface, said first and second outer auxiliary bottom surfaces being disposed at an angle to their respective central bottom surfaces and extending upwardly and outwardly therefrom.

6. A boat hull of the planing type including a substantially horizontal trapezoidal central bottom surface extending forwardly from a stem end of the bull to a medial point of the hull, a generally triangular central bottom surface extending rearwardly from a bow of the hull and intersecting said trapezoidal bottom surface, first outer auxiliary bottom surfaces extending outwardly from said trapezoidal bottom surface, second outer auxiliary surfaces extending outwardly from said triangular bottom surface, said triangular bottom surface extending upwardly and forwardly from its point of intersection with said trapezoidal bottom surface.

7. A boat hull of the planing type including a bottom formed of a plurality of planar surfaces disposed at angles at each other, said surfaces being arranged in sets in longitudinal alignment, central surfaces of each set being disposed normal to a vertical plane passing through a central longitudinal axis of said hull, outer surfaces of each set being disposed at an angle to their respective central surfaces and extending upwardly and outwardly therefrom, said surfaces intersecting one another along straight lines.

8. A boat hull of the planing type including a bottom formed of a plurality of planar surfaces disposed at angles to each other, said surfaces being arranged in sets in longitudinal alignment, central surfaces of each set being disposed normal to a vertical plane passing through a central longitudinal axis of said hull, outer surfaces of each set being disposed at an angle to their respective central surfaces and extending upwardly and outwardly therefrom, said surfaces intersecting one another along straight lines, the surfaces of one set being disposed at an angle to the surfaces of the other set.

References Cited in the file of this patent UNITED STATES PATENTS 1,729,446 Maier Sept. 24, 1929 1,980,998 Knight Nov. 20, 1934 FOREIGN PATENTS 515,361 France Nov. 25, 1930 522,109 France Mar. 22, 1921 

